//
//  UIImage+Tools.m
//  ACE
//
//  Created by Mickey Yin on 2022/2/10.
//

#import "UIImage+Tools.h"

@implementation UIImage (Tools)

- (UIImage *)imageRotatedBydegrees:(CGFloat)degrees {
    
    // calculate the size of the rotated view's containing Box for our drawing space
    UIView *rotatedViewBox = [[UIView alloc] initWithFrame:CGRectMake(0,0,self.size.height, self.size.width)];
    CGAffineTransform t = CGAffineTransformMakeRotation(DegreesToRadians(degrees));
    rotatedViewBox.transform = t;
    CGSize rotatedSize = rotatedViewBox.frame.size;
     
     
    // Create the bitmap context
    UIGraphicsBeginImageContext(rotatedSize);
    CGContextRef bitmap = UIGraphicsGetCurrentContext();
     
    // Move the origin to the middle of the image so we will rotate and scale around the center.
    CGContextTranslateCTM(bitmap,rotatedSize.width/2,rotatedSize.height/2);
 
    //   // Rotate the image context
    CGContextRotateCTM(bitmap,DegreesToRadians(degrees));
     
    // Now,draw the rotated/scaled image into the context
    CGContextScaleCTM(bitmap,1.0,-1.0);
    CGContextDrawImage(bitmap, CGRectMake(-self.size.height/2, -self.size.width/2, self.size.width,self.size.height), [self CGImage]);
     
    UIImage *newImage = UIGraphicsGetImageFromCurrentImageContext();
    UIGraphicsEndImageContext();
    return newImage;
}

@end
